Semaphore UI

Modern UI for Ansible, Terraform/OpenTofu/Terragrunt, PowerShell and other DevOps tools.

If your project has grown and deploying from the terminal is no longer feasible, then Semaphore UI is the tool you need.

Demo

Try Semaphore UI online

What is Semaphore UI?

Semaphore UI is a modern web interface for managing popular DevOps tools.

Semaphore UI allows you to:

• Easily run Ansible playbooks, Terraform and OpenTofu code, as well as Bash and PowerShell scripts.
• Receive notifications about failed tasks.
• Control access to your deployment system.

Key Concepts

1. Projects is a collection of related resources, configurations, and tasks.
2. Task Templates are reusable definitions of tasks that can be executed on demand or scheduled.
3. Task is a specific instance of a job or operation executed by Semaphore.
4. Schedules allow you to automate task execution at specified times or intervals.
5. Inventory is a collection of target hosts (servers, virtual machines, containers, etc.) on which tasks will be executed.
6. Variable Group refers to a configuration context that holds sensitive information such as environment variables and secrets used by tasks during execution.

Getting Started

You can install Semaphore using the following methods:

• Docker
• Deploy a VM from a marketplace:
  • AWS
  • DigitalOcean
  • Vultr
  • Yandex Cloud
• Snap
• Binary file
• Debian or RPM package

Docker

The most popular way to install Semaphore is via Docker.

docker run -p 3000:3000 --name semaphore \
	-e SEMAPHORE_DB_DIALECT=bolt \
	-e SEMAPHORE_ADMIN=admin \
	-e SEMAPHORE_ADMIN_PASSWORD=changeme \
	-e SEMAPHORE_ADMIN_NAME=Admin \
	-e SEMAPHORE_ADMIN_EMAIL=admin@localhost \
	-d semaphoreui/semaphore:latest

We recommend using the Container Configurator to get the ideal Docker configuration for Semaphore.

Other Installation Methods

For more installation options, visit our Installation page.

Documentation

• User Guide
• API Reference
• Postman Collection

Awesome Semaphore

A curated list of awesome things related to Semaphore UI.

• Ebdruplab — Ansible Collections — Ansible modules and a role for managing Semaphore.
• SemaphoreUI MCP Server — A Model Context Protocol (MCP) server that provides AI assistants with powerful automation capabilities for SemaphoreUI.
• Terraform SemaphoreUI Provider — Manage Semaphore UI resources using Terraform.
• PSSemaphore — A PowerShell module designed to work against the Ansible Semaphore REST API.

Contribution

• Contribution Guide
• Dev Container (default user admin / changeme)

License

MIT © Denis Gukov